A:AnswerYes. They're not great quality, but if you just need something "good enough" it works great. It even does borderless printing with the right photo papers.
A:AnswerMy Epson ET-3850 came with 502 inks.
I have read that 502 and 522 are not interchangeable, and are designed for different printer models, so I do not know why you got 522s.
502 is pigment-based and 522 is dye-based.